<s>
Twitch	B-Application
Sings	I-Application
was	O
a	O
free-to-play	O
karaoke	B-Application
video	O
game	O
developed	O
by	O
Harmonix	O
and	O
published	O
by	O
live	O
streaming	O
service	O
Twitch	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
April	O
13	O
,	O
2019	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
macOS	B-Application
.	O
</s>
<s>
Twitch	B-Application
Sings	I-Application
 '	O
servers	O
closed	O
on	O
January	O
1	O
,	O
2021	O
.	O
</s>
<s>
In	O
October	O
2018	O
during	O
TwitchCon	O
,	O
Twitch	O
announced	O
that	O
they	O
'd	O
developed	O
a	O
karaoke	B-Application
video	O
game	O
in	O
collaboration	O
with	O
Harmonix	O
.	O
</s>
<s>
Twitch	B-Application
Sings	I-Application
was	O
released	O
to	O
the	O
public	O
on	O
April	O
13	O
,	O
2019	O
for	O
Microsoft	B-Application
Windows	I-Application
and	O
macOS	B-Application
.	O
</s>
<s>
Mobile	O
versions	O
for	O
iOS	B-Application
and	O
Android	B-Application
were	O
originally	O
planned	O
,	O
but	O
was	O
never	O
released	O
.	O
</s>
<s>
On	O
September	O
4	O
,	O
2020	O
,	O
Twitch	O
announced	O
that	O
they	O
would	O
be	O
closing	O
Twitch	B-Application
Sings	I-Application
by	O
2021	O
.	O
</s>
<s>
Twitch	B-Application
Sings	I-Application
servers	O
were	O
fully	O
shut	O
down	O
on	O
January	O
1	O
,	O
2021	O
.	O
</s>
<s>
Twitch	B-Application
Sings	I-Application
featured	O
both	O
single-player	O
and	O
multiplayer	O
game	O
modes	O
.	O
</s>
